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A new basal actinopterygian fish from the Anisian (Middle Triassic) of Luoping, Yunnan Province, Southwest China

100%

Wen W., Zhang Q.-Y., Hu S.-X., Zhou C.-Y., Xie T., Huang J.-Y., Chen Z. Q., Benton M. J.

Acta Palaeontologica Polonica

2012

tom 57

nr 1

The new neopterygian fish taxon Luoxiongichthys hyperdorsalis gen. et sp. nov. is established on the basis of five specimens from the second member of the Guanling Formation (Anisian, Middle Triassic) from Daaozi Quarry, Luoping, Yunnan Province, Southwest China. The new taxon is characterized by the following characters: triangular body outline with a distinct apex located between skull and dorsal fin; free maxilla; slender preopercular almost vertical; three suborbitals; at least eight strong branchiostegals with tubercles and comb−like ornamentation on the anterior margin; clavicles present; two postcleithra; ganoid scales covered by tubercles and pectinate ornamentation on the posterior margin with peg−and−socket structure; hemiheterocercal tail slightly forked. Comparison with basal actinopterygians reveals that the new taxon has parasemionotid−like triangular symplectics, but a semionotid opercular system. Cladistic analysis suggests that this new genus is a holostean, and either a basal halecomorph or basal semionotiform.

New saurichthyid actinopterygian fishes from the Anisian (Middle Triassic) of southwestern China

80%

Feixiang W., Yuanlin S., Guanghui X., Weicheng H., Dayong J., Zuoyu S.

Acta Palaeontologica Polonica

2011

tom 56

nr 3

A new genus Sinosaurichthys of the Saurichthyidae with three new species, S. longipectoralis, S. longimedialis, and S. minuta, are described and compared with Saurichthys. The new genus is represented by more than a hundred almost complete skeletons, collected from the strata corresponding to the Upper Member of the Guanling Formation (Pelsonian, Anisian, Middle Triassic) of two localities: Yangjuan of Panxian County, Guizhou Province, and Dawazi of Luoping, Yunnan Province, China. Sinosaurichthys differs from Saurichthys in having an unusual dermal pectoral girdle, high insertion of pectoral fin, relatively dorsally positioned axial skeleton in the abdominal region, and in the absence of branchiostegal rays. These differences are supposed to reflect the different life styles between the two genera. Sinosaurichthys, like the extant needlefish, probably has a better ability for cruising in surface water than Saurichthys. In addition, these species of Sinosaurichthys are compared, and their morphological differences also probably reflect individual adaptations for different habitats at the two localities.

The link between ancient and the most modern Actinopterygii: do larvae of osteoglossid fish possess the yolk syncytial layer?

80%

Jaroszewska M., Dabrowski K., Wilczynska B.

Acta Biologica Cracoviensia. Series Botanica. Supplement

2008

tom 50

nr 1

Ograniczanie wyników

2 Acta Palaeontologica Polonica

1 Acta Biologica Cracoviensia. Series Botanica. Supplement

1 Benton M. J.

1 Chen Z. Q.

1 Dabrowski K.

1 Dayong J.

1 Feixiang W.

1 Guanghui X.

1 Hu S.-X.

1 Huang J.-Y.

1 Jaroszewska M.

1 Weicheng H.

1 Wen W.

1 Wilczynska B.

1 Xie T.

1 Yuanlin S.

1 Zhang Q.-Y.

1 Zhou C.-Y.

1 Zuoyu S.

1 2012

1 2011

1 2008

Wyniki wyszukiwania

A new basal actinopterygian fish from the Anisian (Middle Triassic) of Luoping, Yunnan Province, Southwest China

New saurichthyid actinopterygian fishes from the Anisian (Middle Triassic) of southwestern China

The link between ancient and the most modern Actinopterygii: do larvae of osteoglossid fish possess the yolk syncytial layer?